//
//  NetworkStatus.m
//  iGSS
//
//  Copyright 2010 Electronic Business Systems Ltd.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//

#import "NetworkStatus.h"

#import <SystemConfiguration/SCNetworkReachability.h>
#import <netinet/in.h>

@implementation NetworkStatus

static SCNetworkReachabilityRef defaultRouteReachability;

+ (void)initialize {
    struct sockaddr_in zeroAddress;
    bzero(&zeroAddress, sizeof(zeroAddress));
    zeroAddress.sin_len = sizeof(zeroAddress);
    zeroAddress.sin_family = AF_INET;
    defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);
}

+ (BOOL)networkAvailable {
    SCNetworkReachabilityFlags flags;
    BOOL valid = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    return (valid ? flags & kSCNetworkReachabilityFlagsReachable : NO);    
}

+ (BOOL)wifiAvailable {
    SCNetworkReachabilityFlags flags;
    BOOL valid = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    if (!valid)
        return NO;
    if (!(flags & kSCNetworkReachabilityFlagsReachable))
        return NO;
    if (flags & kSCNetworkReachabilityFlagsIsWWAN)
        return NO;
    return YES;
}

@end
